How to make pyftpdlib follow symbolic links?

[NightMachinery]

I start the server by

python -m pyftpdlib -i '0.0.0.0' -p 8119 -d ~/Base/shared --debug

I can connect to this server, but I do not see my symbolic links there.

[NightMachinery]

Another client does see the links, but can't enter them:

[I 2021-03-05 13:02:29] 192.168.1.12:51542-[anonymous] USER 'anonymous' logged in.
[D 2021-03-05 13:02:29] 192.168.1.12:51542-[anonymous] <- PWD
[D 2021-03-05 13:02:29] 192.168.1.12:51542-[anonymous] -> 257 "/" is the current directory.
[D 2021-03-05 13:02:29] 192.168.1.12:51542-[anonymous] <- CWD dl
[D 2021-03-05 13:02:29] 192.168.1.12:51542-[anonymous] -> 550 "/" points to a path which is outside the user's root directory.

[giampaolo]

550 "/" points to a path which is outside the user's root directory.

See:

pyftpdlib/pyftpdlib/filesystems.py

Lines 204 to 213 in 2a1185d

	def validpath(self, path):
	"""Check whether the path belongs to user's home directory.
	Expected argument is a "real" filesystem pathname.
	If path is a symbolic link it is resolved to check its real
	destination.
	Pathnames escaping from user's root directory are considered
	not valid.
	"""

[NightMachinery]

@giampaolo commented on Mar 5, 2021, 2:14 PM GMT+3:30:

550 "/" points to a path which is outside the user's root directory.

See:

pyftpdlib/pyftpdlib/filesystems.py

Lines 204 to 213 in 2a1185d

	def validpath(self, path):
	"""Check whether the path belongs to user's home directory.
	Expected argument is a "real" filesystem pathname.
	If path is a symbolic link it is resolved to check its real
	destination.
	Pathnames escaping from user's root directory are considered
	not valid.
	"""

Well, is there an option to disable this check, without forking the code? (Monkey patching perhaps?)

[giampaolo]

https://pyftpdlib.readthedocs.io/en/latest/api.html#pyftpdlib.filesystems.UnixFilesystem

[Phuker]

import pyftpdlib.filesystems
import pyftpdlib.__main__

pyftpdlib.filesystems.AbstractedFS.validpath = lambda self, path: True
pyftpdlib.__main__.main()

Save as foo.py, replace python -m pyftpdlib with python foo.py:

python foo.py -i '0.0.0.0' -p 8119 -d ~/Base/shared --debug